Tail gas absorption tower for unsymmetrical dimethylhydrazine production

Abstract

The utility model belongs to the technical field of tail gas absorption towers, and particularly relates to a tail gas absorption tower for unsymmetrical dimethylhydrazine production, which comprises a tower body, a gas inlet pipe fixedly connected to the lower part of the tower body, an exhaust pipe fixedly connected to the upper part of the tower body, a storage filter screen fixedly connected to the lower part in the tower body, and a filler arranged on the upper part of the storage filter screen, a spraying set is arranged on the upper portion in the tower body, a discharging set is arranged at the position, located on the upper side of the containing filter screen, of one side of the tower body, a first electric push rod is fixedly connected to the side, opposite to the discharging set, of the tower body, and the output end of the first electric push rod is fixedly connected with a material pushing plate capable of sliding on the upper side of the containing filter screen. The discharging set comprises a waste discharging pipe which is fixedly connected to one side of the tower body and located on the upper side of the containing filter screen, and a valve set is installed on the waste discharging pipe. According to the utility model, the filler which is most seriously corroded can be simply and directly replaced, the number of the replaced filler is reduced, and the filterability of the replaced filler can be effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of tail gas absorption towers, and specifically relates to a tail gas absorption tower for unsymmetrical dimethylhydrazine production. Background Art

[0002] During the production of UDMH, the tail gas generated is usually highly corrosive and therefore needs to be treated in a tail gas absorption tower to purify the waste gas and reduce pollution to the environment.

[0003] For example, the Chinese patent with the authorization announcement number CN220176515U discloses a high-efficiency tail gas absorption tower, which filters the exhaust gas through the filler and then purifies it through the agent sprayed by the spray group;

[0004] However, due to the high corrosiveness of the tail gas generated during the production of UDMH, the packing may be corroded during long-term use, resulting in a gradual decline in filtration performance. In order to maintain the filtration performance while ensuring the gas flow and filtration efficiency of the packing, the packing maintenance method is usually to replace the packing regularly rather than directly adding more packing on top of the packing.

[0005] In the existing tail gas absorption tower structure, the packing located at the bottom is more severely corroded than the packing located at the top, and the packing located at the bottom is restricted by the packing located at the top and cannot be directly removed and replaced. Therefore, the packing replacement usually requires the disassembly of the entire packing layer, resulting in a large number of packings to be replaced, which greatly increases the maintenance cost. Utility Model Content

[0006] The purpose of this utility model is to provide a tail gas absorption tower for the production of unsymmetrical dimethylhydrazine, which can simply and directly replace the most severely corroded packing, reduce the number of packings to be replaced, and effectively ensure the filterability after the packing is replaced.

[0007] The technical solutions adopted in this application are as follows:

[0008] A tail gas absorption tower for the production of unsymmetrical dimethylhydrazine comprises a tower body, wherein the lower portion of the tower body is fixedly connected to an air inlet pipe, the upper portion of the tower body is fixedly connected to an exhaust pipe, the lower portion of the interior of the tower body is fixedly connected to a storage filter, the upper portion of the storage filter is provided with filler, the upper portion of the interior of the tower body is provided with a spray group, a discharging group is provided on one side of the tower body at a position above the storage filter, a first electric push rod is fixedly connected to the side of the tower body opposite to the discharging group, and the output end of the first electric push rod is fixedly connected to a push plate that can slide on the upper side of the storage filter.

[0009] Furthermore, the discharge group includes a waste discharge pipe fixedly connected to one side of the tower body and located above the filter screen, and a valve group is installed on the waste discharge pipe.

[0010] Furthermore, a first storage box is fixedly connected to a side of the tower body away from the waste discharge pipe, the first electric push rod is fixedly connected to the first storage box, and the push plate can slide into the interior of the first storage box.

[0011] Furthermore, the upper end of the push plate is inclined toward a side close to the waste discharge pipe.

[0012] Furthermore, a material distribution plate slidably connected to the inside of the tower body is installed on the tower body, and the lower side height of the material distribution plate is higher than the upper side height of the pusher plate.

[0013] Furthermore, a second storage box is fixedly connected to the outer side of the tower body, and the material dividing plate can slide into the interior of the second storage box. The end of the second storage box away from the tower body is fixedly connected to a second electric push rod, and the output end of the second electric push rod is fixedly connected to the material dividing plate.

[0014] The technical effects achieved by this utility model are:

[0015] The utility model relates to a tail gas absorption tower for producing unsymmetrical dimethylhydrazine, which directly discharges the filler located at the bottom from the discharge group by arranging a push plate, so that the filler with the most serious corrosion can be replaced simply and directly, thereby reducing the number of fillers to be replaced and effectively ensuring the filterability after the filler is replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of this utility model;

[0017] Figure 2 It is a schematic diagram of the cutaway structure of this utility model;

[0018] Figure 3 It is a partial cutaway enlarged view of this utility model;

[0019] Figure 4 This is a practical Figure 3 A partial enlarged view of point A in the middle;

[0020] Figure 5 It is a partially cutaway enlarged view of the present invention from another perspective.

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0022] 1. Tower body; 2. Air inlet pipe; 3. Exhaust pipe; 4. Storage filter; 5. Filler; 6. Spray group; 7. Waste discharge pipe; 8. Valve group; 9. First storage box; 10. First electric push rod; 11. Push plate; 12. Second storage box; 13. Second electric push rod; 14. Distributor plate. DETAILED DESCRIPTION

[0023] In order to make the purpose and advantages of this utility more clear, the utility is described in detail below with reference to the embodiments. It should be understood that the following text is only used to describe one or several specific implementation methods of this utility and does not strictly limit the scope of protection specifically requested by this utility.

[0024] like Figure 1-2 As shown, a tail gas absorption tower for the production of unsymmetrical dimethylhydrazine includes a tower body 1, an air inlet pipe 2 is fixedly connected to the lower part of the tower body 1, and an exhaust pipe 3 is fixedly connected to the upper part of the tower body 1. The tail gas generated during the production of unsymmetrical dimethylhydrazine enters the interior of the tower body 1 through the air inlet pipe 2, and is discharged through the exhaust pipe 3 after being purified inside the tower body 1;

[0025] In order to purify the exhaust gas, a filter screen 4 is fixedly connected to the lower part of the interior of the tower body 1, and a filler 5 is provided on the upper part of the filter screen 4. When the exhaust gas passes through the filter screen 4 and the filler 5, the impurities in the exhaust gas will be filtered through the filter screen 4 and the filler 5. A spray group 6 is provided on the upper part of the interior of the tower body 1, and the spray group 6 can spray out chemicals to purify the filtered exhaust gas.

[0026] Since the tail gas generated during the production of unsymmetrical dimethylhydrazine is highly corrosive, the filtering performance of the packing 5 will gradually decline when it is corroded. In order to maintain the filtering performance of the packing 5, the packing 5 needs to be replaced. In order to reduce the number of replacements of the packing 5 and better maintain the filtering performance of the packing 5, since the packing 5 located at the lower part is more severely corroded than the packing 5 located at the upper part, in this technical solution, a discharge group is provided on one side of the tower body 1 at a position above the storage filter 4, and a first electric push rod 10 is fixedly connected to the side of the tower body 1 opposite to the discharge group, and an output end of the first electric push rod 10 is fixedly connected to a push plate 11 that can slide on the upper side of the storage filter 4;

[0027] The discharge group includes a waste discharge pipe 7 fixedly connected to one side of the tower body 1 and located above the filter screen 4. A valve group 8 is installed on the waste discharge pipe 7;

[0028] At this time, when the packing 5 needs to be replaced, the valve group 8 and the push plate 11 are started. When the valve group 8 is started, the waste discharge pipe 7 will be in an open state. After the first electric push rod 10 is started, it will drive the push plate 11 to move, so that the push plate 11 pushes the packing 5 at the bottom toward the waste discharge pipe 7 until the packing 5 at the bottom is discharged through the waste discharge pipe 7. A feeding port is provided on the tower body 1 and located above the packing 5. A blocking door is installed at the feeding port. At this time, the blocking door is opened, and the unused packing 5 can be transported to the upper part of the packing 5 through the feeding port to ensure the filtering performance of the packing 5 assembly.

[0029] Among them, such as Figure 2-4As shown, in order to enable the push plate 11 to completely push the filler 5 located at the bottom, a first storage box 9 is fixedly connected to the side of the tower body 1 away from the waste discharge pipe 7, and a first electric push rod 10 is fixedly connected to the first storage box 9. The push plate 11 can slide to the inside of the first storage box 9. Initially, the push plate 11 is located inside the first storage box 9. When the first electric push rod 10 drives the push plate 11 to slide, the filler 5 located at the bottom can be completely pushed to the waste discharge pipe 7 through the push plate 11.

[0030] like Figure 2-4 As shown, the upper end of the push plate 11 is inclined toward the side close to the waste discharge pipe 7. At this time, when the push plate 11 moves toward the direction close to the waste discharge pipe 7, the filler 5 will be pushed into the waste discharge pipe 7. When the push plate 11 moves toward the direction close to the first storage box 9, the slope of the push plate 11 will be used to push the filler 5 upward, thereby reducing the influence of the filler 5 on the push plate 11 when it is reset.

[0031] Moreover, if Figure 1-2 and Figure 5 As shown, the tower body 1 is provided with a dividing plate 14 which can be slidably connected to the interior of the tower body 1. The lower side height of the dividing plate 14 is higher than the upper height of the pushing plate 11, that is, the dividing plate 14 and the pushing plate 11 are clearance-matched. When the lower part of the filler 5 is discharged, the dividing plate 14 is slid into the interior of the filler 5 to separate the filler 5 into two parts, the filler 5 located at the lower part can be pushed out by the pushing plate 11, and the filler 5 located at the upper part is blocked by the dividing plate 14 and will not fall, thereby reducing the influence of the filler 5 on the pushing plate 11 when it is reset.

[0032] Specifically, a second storage box 12 is fixedly connected to the outside of the tower body 1, and a material dividing plate 14 can slide into the interior of the second storage box 12. In order to drive the material dividing plate 14 to move, the second storage box 12 is fixedly connected to the end away from the tower body 1 with a second electric push rod 13. The output end of the second electric push rod 13 is fixedly connected to the material dividing plate 14. By starting the second electric push rod 13, the material dividing plate 14 can be driven to move.

[0033] The working principle of the utility model is as follows: the tail gas generated during the production of unsymmetrical dimethylhydrazine enters the interior of the tower body 1 through the air inlet pipe 2, and rises inside the tower body 1. When the exhaust gas passes through the filter screen 4 and the filler 5, the impurities in the tail gas are filtered by the filter screen 4 and the filler 5. After the filtration is completed, the reagent sprayed by the spray group 6 will purify the filtered tail gas, and the purified gas is discharged through the exhaust pipe 3 after the purification is completed.

[0034] When the packing 5 is severely corroded, the valve group 8 and the push plate 11 are activated. When the valve group 8 is activated, the waste discharge pipe 7 is opened. After the first electric push rod 10 is activated, it drives the push plate 11 to move, so that the push plate 11 pushes the packing 5 at the bottom toward the waste discharge pipe 7 until the packing 5 at the bottom is discharged through the waste discharge pipe 7.

[0035] In summary, this technical solution directly discharges the filler 5 located at the bottom from the discharge group by setting a push plate 11, which can simply and directly replace the filler 5 with the most serious corrosion, reduce the number of fillers 5 to be replaced, and effectively ensure the filterability of the filler 5 after replacement.

[0036] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this application shall be implemented in accordance with conventional means in the art unless otherwise specified or limited.

Claims

1. A tail gas absorption tower for the production of unsymmetrical dimethylhydrazine, comprising a tower body (1), wherein the lower portion of the tower body (1) is fixedly connected to an air inlet pipe (2), the upper portion of the tower body (1) is fixedly connected to an exhaust pipe (3), the lower portion of the interior of the tower body (1) is fixedly connected to a filter screen (4), the upper portion of the filter screen (4) is provided with a filler (5), and the upper portion of the interior of the tower body (1) is provided with a spray group (6), characterized in that: A discharge group is provided on one side of the tower body (1) at a position above the storage filter (4); a first electric push rod (10) is fixedly connected to the side of the tower body (1) opposite to the discharge group; and a push plate (11) that can slide on the upper side of the storage filter (4) is fixedly connected to the output end of the first electric push rod (10); A feeding port is provided on the tower body (1) and located above the filler (5), and a blocking door is installed at the feeding port.

2. A tail gas absorption tower for producing unsymmetrical dimethylhydrazine according to claim 1, characterized in that: The discharge group comprises a waste discharge pipe (7) fixedly connected to one side of the tower body (1) and located on the upper side of the filter screen (4); a valve group (8) is installed on the waste discharge pipe (7).

3. A tail gas absorption tower for producing unsymmetrical dimethylhydrazine according to claim 2, characterized in that: A first storage box (9) is fixedly connected to the side of the tower body (1) away from the waste discharge pipe (7), the first electric push rod (10) is fixedly connected to the first storage box (9), and the push plate (11) can slide into the interior of the first storage box (9).

4. A tail gas absorption tower for producing unsymmetrical dimethylhydrazine according to claim 2, characterized in that: The upper end of the push plate (11) is inclined toward a side close to the waste discharge pipe (7).

5. A tail gas absorption tower for producing unsymmetrical dimethylhydrazine according to claim 2, characterized in that: The tower body (1) is provided with a material distribution plate (14) which is slidably connected to the interior of the tower body (1), and the lower side height of the material distribution plate (14) is higher than the upper side height of the push plate (11).

6. A tail gas absorption tower for the production of UDMH according to claim 5, characterized in that: A second storage box (12) is fixedly connected to the outer side of the tower body (1), and the material dividing plate (14) can slide into the interior of the second storage box (12). An end of the second storage box (12) away from the tower body (1) is fixedly connected to a second electric push rod (13), and an output end of the second electric push rod (13) is fixedly connected to the material dividing plate (14).

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